<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
	</head>
	<body>
		<input name="btn" type="button" value="税后金额" onclick="account();" />
		<script type="text/javascript">
			 function account(){
				 var money=prompt("输入金额")
			 }
		</script>
	</body>
</html>
